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Encoding the structure of many-body localization with matrix product operators

Journal Article · · Physical Review. B
 [1];  [2]
  1. Univ. of Pittsburgh, PA (United States); DOE/OSTI
  2. Univ. of Illinois at Urbana-Champaign, IL (United States)

Anderson insulators are noninteracting disordered systems which have localized single-particle eigenstates. The interacting analog of Anderson insulators are the many-body localized (MBL) phases. The spectrum of the many-body eigenstates of an Anderson insulator is efficiently represented as a set of product states over the single-particle modes. Here, we show that product states over matrix product operators of small bond dimension is the corresponding efficient description of the spectrum of an MBL insulator. In this language all of the many-body eigenstates are encoded by matrix product states (i.e., density matrix renormalization group wave functions) consisting of only two sets of low bond dimension matrices per site: the Gi matrices corresponding to the local ground state on site i and the Ei matrices corresponding to the local excited state. All 2n eigenstates can be generated from all possible combinations of these sets of matrices.

Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Charles E. Kaufman Foundation; National Science Foundation (NSF)
Grant/Contract Number:
SC0008692; SC0008692
OSTI ID:
1535826
Alternate ID(s):
OSTI ID: 1338859
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 3 Vol. 95; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (14)

Many-body mobility edge due to symmetry-constrained dynamics and strong interactions journal August 2015
Finding matrix product state representations of highly-excited eigenstates of many-body localized Hamiltonians text January 2015
Bimodal entanglement entropy distribution in the many-body localization transition text January 2016
The Ergodic Side of the Many-Body Localization Transition text January 2016
Almost-conserved operators in nearly many-body localized systems text January 2017
Bulk Geometry of the Many Body Localized Phase from Wilson-Wegner Flow preprint January 2019
The ergodic side of the many-body localization transition: The ergodic side of the many-body localization transition journal May 2017
Signatures of the many-body localized regime in two dimensions journal November 2018
Entanglement transitions from holographic random tensor networks journal October 2019
Operator entanglement entropy of the time evolution operator in chaotic systems journal March 2017
Quantum dynamics of thermalizing systems journal January 2018
Efficient Representation of Fully Many-Body Localized Systems Using Tensor Networks journal May 2017
Quantum dynamics of thermalizing systems text January 2017
Signatures of the Many-body Localized Regime in Two Dimensions text January 2017

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